TS4974IQT STMicroelectronics, TS4974IQT Datasheet - Page 17
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TS4974IQT
Manufacturer Part Number
TS4974IQT
Description
IC AMP AUDIO PWR 1W MONO 10DFN
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet
1.TS4974IQT.pdf
(25 pages)
Specifications of TS4974IQT
Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
1W x 1 @ 8 Ohm
Voltage - Supply
2.5 V ~ 5.5 V
Features
Depop, Differential Inputs, Standby, Thermal Protection, Volume Control
Mounting Type
Surface Mount
Package / Case
10-DFN
For Use With
497-6382 - BOARD DEMO FOR TS4974IQT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-5994-2
TS4974
4.3
Assumptions:
Power dissipation and efficiency
●
●
The output voltage is:
and
and
Therefore, the average current delivered by the supply voltage is:
Equation 1
The power delivered by the supply voltage is:
Therefore, the power dissipated by each amplifier is:
Equation 2
Load voltage and current are sinusoidal (V
Supply voltage is a pure DC source (V
P
P
supply
diss
= P
= V
supply
CC
I
CC AVG
- P
out
(W)
(W)
P
diss
I
CC
V
P
=
out
out
AVG = 2
I
out
2 2V
---------------------- P
= V peak sinωt (V)
=
π R
=
CC
V
-------------------- - (W)
V
------------ - (A)
peak
2R
R
CC
)
L
out
out
L
V
---------------- - (A)
L
πR
2
peak
and I
L
out
–
P
out
out
)
Application information
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